Product Idea -- The Faux Rat

Thinking about the Aibo and the new robot mowers plus the unquenable need of my friends' cat to chase moving items (not to mention the fact that the cat pee-ed on my sleeping bag last night), gave me the idea that a robot cat toy is an opportunity. Imagine a little battery powered toy with some small sensors that would run around the apartment/carpet when activated -- basically pretending to be a small rodent. Anyway, you get the idea.. manufacture the thing with a retail of 99$. Cat lovers would eat it up.